Manga by author Gwa-in - Status ongoing

When I opened my eyes, the first thing I realized is that I am not a living person. Who am I? Why am I wandering around this place? And who is that man who visits my grave every week?

I broke up with my boyfriend of 10 years. Out of nowhere, I received a phone call from him asking for help. But, why does he suddenly look so young when I went to meet him?